I have been telling everyone for years now, that if they recreate the arranger in an ableton like fashion, and add some knobs ( how they are missing ) kids will love the new version of arrangers...
Tell that to the designers...
I am a big fan of ableton myself, and it would work very well together with the main feature of arrangers.... Mellody lines following realtime chord choices...
Playing mellodies on these pads is just a thing of fashion, keys with aftertouch allow offcourse for much more expression..